Mr. Holland's Opus(1995) [Louis Russ]: Killed in combat (off-screen) in Vietnam; we only see his funeral afterwards. (Thanks to Sonya)

Four Brothers(2005) [Lt. Green]: Shot repeatedly by Josh Charles outside a bar after Terrence discovers Josh's corruption; Johs then makes it look like a gang killing. (Thanks to ND, Sonya, and Steve)

Idlewild(2006) [Trumpy]: Shot in the back by Andre Benjamin just as Terrence is about to shoot Antwan A. 'Big Boi' Patton in a crowded nightclub, after Terrence had already shot Paula Patton. (Thanks to ND)